General restrictions. No land shall be used or structure erected where the land is held unsuitable for such use or structure by reason of flooding, concentrated runoff, inadequate drainage, adverse soil or rock formation, unfavorable topography, low bearing strength, erosion susceptibility or any other feature likely to be harmful to the health, safety, prosperity, aesthetics and general welfare of the City. The Zoning Administrator, in applying the provisions of this subsection, shall, in writing, recite the particular facts upon which he bases his conclusion that the land is not suitable for certain uses. The applicant shall have an opportunity to appeal a finding of such unsuitability to the Zoning Board of Appeals if he so desires. Thereafter, the Zoning Administrator may affirm, modify or withdraw his determination of unsuitability.